Texas Instruments LMZ14201 SIMPLE SWITCHER User manual

LMZ14201
www.ti.com SNVS649E –JANUARY 2010–REVISED MARCH 2013
LMZ14201 1A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage
Check for Samples: LMZ14201
1FEATURES DESCRIPTION
2• Integrated Shielded Inductor The LMZ14201 SIMPLE SWITCHER power module
• Simple PCB Layout is an easy-to-use step-down DC-DC solution capable
of driving up to 1A load with exceptional power
• Flexible Startup Sequencing Using External conversion efficiency, line and load regulation, and
Soft-start and Precision Enable output accuracy. The LMZ14201 is available in an
• Protection Against Inrush Currents and Faults innovative package that enhances thermal
such as Input UVLO and Output Short Circuit performance and allows for hand or machine
• – 40°C to 125°C Junction Temperature Range soldering.
• Single Exposed Pad and Standard Pinout for The LMZ14201 can accept an input voltage rail
Easy Mounting and Manufacturing between 6V and 42V and deliver an adjustable and
highly accurate output voltage as low as 0.8V. The
• Fast Transient Response for Powering FPGAs LMZ14201 only requires three external resistors and
and ASICs four external capacitors to complete the power
• Low Output Voltage Ripple solution. The LMZ14201 is a reliable and robust
• Pin-to-pin Compatible Family: design with the following protection features: thermal
shutdown, input under-voltage lockout, output over-
– LMZ14203/2/1 (42V Max 3A, 2A, 1A) voltage protection, short-circuit protection, output
– LMZ12003/2/1 (20V Max 3A, 2A, 1A) current limit, and allows startup into a pre-biased
• Fully Enabled for Webench® Power Designer output. A single resistor adjusts the switching
frequency up to 1 MHz.
APPLICATIONS ELECTRICAL SPECIFICATIONS
• Point of Load Conversions from 12V and 24V
Input Rail • 6W Maximum Total Output Power
• Time Critical Projects • Up to 1A Output Current
• Space Constrained / High Thermal • Input Voltage Range 6V to 42V
Requirement Applications • Output Voltage Range 0.8V to 6V
• Negative Output Voltage Applications • Efficiency up to 90%
(See AN-2027) SNVA425 PERFORMANCE BENEFITS
• Operates at High Ambient Temperature with
no Thermal Derating
• High Efficiency Reduces System Heat
Generation
• Low Radiated Emissions (EMI) Complies with
EN55022 Class B Standard
• Low External Component Count
Figure 1. Easy To Use 7 Pin Package
PFM 7 Pin Package
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θJA = 20°C/W, θJC = 1.9°C/W
RoHS Compliant
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2010–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

0.0
10.0
30.0
40.0
50.0
70.0
0FREQUENCY (MHz)
RADIATED EMISSIONS (dBµV/m)
20.0
60.0
80.0
200 400 600 800 1000
EN 55022 CLASS B LIMIT
0
0.2
0.4
0.6
0.8
1
1.2
50 60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
OUTPUT CURRENT (A)
50
55
60
65
70
75
80
85
90
95
100
0 0.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
EFFICIENCY (%)
LMZ14201
SNVS649E –JANUARY 2010–REVISED MARCH 2013 www.ti.com
System Performance
Efficiency VIN = 24V VOUT = 5.0V
Thermal Derating Curve
VIN = 24V, VOUT = 5.0V,
Radiated Emissions (EN 55022 Class B)
from Evaluation Board
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Exposed Pad
Connect to GND
5 SS
6 FB
3 EN
1 VIN
2 RON
4 GND
7 VOUT
VIN
CIN
10 PF
Enable
RON
See Table RFBT
CFF 0.022 PF
See Table
CSS
0.022 PF
RFBB
See Table 100 PF
LMZ14201
VOUT FB RON SS
VIN
EN
GND
VOUT@ 1A
5V 5.62k 1.07k 100k 7.5...42V
VOUT RFBT RFBB RON VIN Range
3.3V 3.32k 1.07k 61.9k 6...42V
2.5V 2.26k 1.07k 47.5k 6...30V
1.8V 1.87k 1.50k 32.4k 6...25V
1.5V 1.00k 1.13k 28.0k 6...21V
1.2V 4.22k 8.45k 22.6k 6...19V
0.8V 0 39.2k 24.9k 6...18V
LMZ14201
www.ti.com SNVS649E –JANUARY 2010–REVISED MARCH 2013
Simplified Application Schematic
Connection Diagram
Figure 2. Top View
7-Lead PFM
Pin Descriptions
Pin Name Description
1 VIN Supply input — Nominal operating range is 6V to 42V . A small amount of internal capacitance is contained within the
package assembly. Additional external input capacitance is required between this pin and exposed pad.
2 RON On Time Resistor — An external resistor from VIN to this pin sets the on-time of the application. Typical values range from
25k to 124k ohms.
3 EN Enable — Input to the precision enable comparator. Rising threshold is 1.18V nominal; 90 mV hysteresis nominal.
Maximum recommended input level is 6.5V.
4 GND Ground — Reference point for all stated voltages. Must be externally connected to EP.
5 SS Soft-Start — An internal 8 µA current source charges an external capacitor to produce the soft-start function. This node is
discharged at 200 µA during disable, over-current, thermal shutdown and internal UVLO conditions.
6 FB Feedback — Internally connected to the regulation, over-voltage, and short-circuit comparators. The regulation reference
point is 0.8V at this input pin. Connected the feedback resistor divider between the output and ground to set the output
voltage.
7 VOUT Output Voltage — Output from the internal inductor. Connect the output capacitor between this pin and exposed pad.
EP EP Exposed Pad — Internally connected to pin 4. Used to dissipate heat from the package during operation. Must be
electrically connected to pin 4 external to the package.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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LMZ14201
SNVS649E –JANUARY 2010–REVISED MARCH 2013 www.ti.com
Absolute Maximum Ratings (1)(2)
VIN, RON to GND -0.3V to 43.5V
EN, FB, SS to GND -0.3V to 7V
Junction Temperature 150°C
Storage Temperature Range -65°C to 150°C
ESD Susceptibility(3) ± 2 kV
For soldering specifications:
see product folder at www.ti.com and SNOA549
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The human body model is a 100pF capacitor discharged through a 1.5 kΩresistor into each pin. Test method is per JESD-22-114.
Operating Ratings (1)
VIN 6V to 42V
EN 0V to 6.5V
Operation Junction Temperature −40°C to 125°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
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LMZ14201
www.ti.com SNVS649E –JANUARY 2010–REVISED MARCH 2013
Electrical Characteristics
Limits in standard type are for TJ= 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +125°C. Minimum and Maximum limits are ensured through test, design or statistical correlation. Typical values represent
the most likely parametric norm at TJ= 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: VIN = 24V, Vout = 3.3V Min Typ Max
Symbol Parameter Conditions Units
(1) (2) (1)
SYSTEM PARAMETERS
Enable Control(3)
VEN EN threshold trip point VEN rising 1.10 1.18 1.25 V
VEN-HYS EN threshold hysteresis VEN falling 90 mV
Soft-Start
ISS SS source current VSS = 0V 5811 µA
ISS-DIS SS discharge current -200 µA
Current Limit
ICL Current limit threshold d.c. average 1.4 1.95 3.0 A
ON/OFF Timer
tON-MIN ON timer minimum pulse width 150 ns
tOFF OFF timer pulse width 260 ns
Regulation and Over-Voltage Comparator
VFB In-regulation feedback voltage VSS >+ 0.8V .777 0.798 0.818 V
TJ= -40°C to 125°C
IO= 1A
VSS >+ 0.8V 0.786 0.802 0.818 V
TJ= 25°C
IO= 10 mA
VFB-OV Feedback over-voltage 0.92 V
protection threshold
IFB Feedback input bias current 5 nA
IQNon Switching Input Current VFB= 0.86V 1 mA
ISD Shut Down Quiescent Current VEN= 0V 25 μA
Thermal Characteristics
TSD Thermal Shutdown Rising 165 °C
TSD-HYST Thermal shutdown hysteresis Falling 15 °C
θJA Junction to Ambient(4) 4 layer JEDEC Printed Circuit Board, 19.3 °C/W
100 vias, No air flow
2 layer JEDEC Printed Circuit Board, No 21.5 °C/W
air flow
θJC Junction to Case No air flow 1.9 °C/W
PERFORMANCE PARAMETERS
ΔVOOutput Voltage Ripple 8 mV PP
ΔVO/ΔVIN Line Regulation VIN = 12V to 42V, IO= 1A .01 %
ΔVO/IOUT Load Regulation VIN = 24V 1.5 mV/A
ηEfficiency VIN = 24V VO= 3.3V IO= 1A 92 %
(1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely parametric norm.
(3) EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See AN-2024 and layout for information on device under test.
(4) θJA measured on a 1.705” x 3.0” four layer board, with one ounce copper, thirty five 12 mil thermal vias, no air flow, and 1W power
dissipation. Refer to PCB layout diagrams
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0
0.1
0.2
0.3
0.6
0.7
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
25°C
0.4
0.5
2.5
3.3
5.0
6.0
1.8
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
25°C
1.8
3.3
2.5
5.0
6.0
0
0.075
0.15
0.225
0.3
0.375
0.45
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
25°C
1.5
1.8
2.5
3.3
1.2
0.8
5.0
6.0
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
25°C
1.8
1.2
1.5
0.8
3.3
2.5
5.0
6.0
0
0.05
0.1
0.15
0.2
0.25
0.3
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
25°C
1.2
0.8
1.5
1.8
2.5
3.3
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
25°C
1.8
1.2
1.5
0.8
3.3
2.5
LMZ14201
SNVS649E –JANUARY 2010–REVISED MARCH 2013 www.ti.com
Typical Performance Characteristics
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO= 100uF X7R Ceramic;
Tambient = 25 C for efficiency curves and waveforms.
Efficiency 6V Input @ 25°C Dissipation 6V Input @ 25°C
Figure 3. Figure 4.
Efficiency 12V Input @ 25°C Dissipation 12V Input @ 25°C
Figure 5. Figure 6.
Efficiency 24V Input @ 25°C Dissipation 24V Input @ 25°C
Figure 7. Figure 8.
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0
0.075
0.15
0.225
0.3
0.375
0.45
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
85°C
1.5
1.8
1.2
2.5
3.3
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
1.8
1.2
1.5
3.3
2.5
0
0.2
0.4
0.6
0.8
1.0
1.2
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
25°C
3.3
5.0
6.0
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
25°C
3.3
5.0
6.0
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
25°C
3.3
5.0
6.0
0
0.2
0.4
0.6
0.8
1.0
1.2
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
25°C
3.3
5.0
6.0
LMZ14201
www.ti.com SNVS649E –JANUARY 2010–REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO= 100uF X7R Ceramic;
Tambient = 25 C for efficiency curves and waveforms.
Efficiency 36V Input @ 25°C Dissipation 36V Input @ 25°C
Figure 9. Figure 10.
Efficiency 42V Input @ 25°C Dissipation 42V Input @ 25°C
Figure 11. Figure 12.
Efficiency 6V Input @ 85°C Dissipation 6V Input @ 85°C
Figure 13. Figure 14.
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0
0.2
0.4
0.6
0.8
1.0
1.2
00.2 0.4 0.6 0.8 1
DISSIPATION (W)
85°C
3.3
5.0
6.0
2.5
1.8
OUTPUT CURRENT (A)
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
1.8
3.3
2.5
5.0
6.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0 0.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
85°C
1.2
2.5
3.3
5.0
6.0
1.5
1.8
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
1.8
1.2
1.5
3.3
2.5
5.0
6.0
0
0.075
0.15
0.225
0.3
0.375
0.45
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
DISSIPATION (W)
85°C
1.5
1.8
1.2
2.5
3.3
5.0
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
1.8
1.2
1.5
3.3
2.5
5.0
LMZ14201
SNVS649E –JANUARY 2010–REVISED MARCH 2013 www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO= 100uF X7R Ceramic;
Tambient = 25 C for efficiency curves and waveforms.
Efficiency 8V Input 85°C Dissipation 8V Input 85°C
Figure 15. Figure 16.
Efficiency 12V Input@ 85°C Dissipation 12V Input @ 85°C
Figure 17. Figure 18.
Efficiency 24V Input @ 85°C Dissipation 24V Input @ 85°C
Figure 19. Figure 20.
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3.26
3.28
3.30
3.32
3.34
3.36
0 0.2
OUTPUT CURRENT (A)
OUTPUT VOLTAGE (V)
85°C
0.4 0.6 0.8 1.0
6
812
24
20
36
42
3.24
3.26
3.28
3.30
3.32
3.34
0 0.2
OUTPUT CURRENT (A)
OUTPUT VOLTAGE (V)
25°C
68
12
24
20
36
42
0.4 0.6 0.8 1.0
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
3.3
5.0
6.0
0
0.2
0.4
0.6
0.8
1.0
1.2
00.2 0.4 0.6 0.8 1
DISSIPATION (W)
85°C
3.3
5.0
6.0
OUTPUT CURRENT (A)
0
0.2
0.4
0.6
0.8
1.0
1.2
00.2 0.4 0.6 0.8 1
DISSIPATION (W)
85°C
3.3
5.0
6.0
OUTPUT CURRENT (A)
EFFICIENCY (%)
50
55
60
65
70
75
80
85
90
95
100
00.2 0.4 0.6 0.8 1
OUTPUT CURRENT (A)
85°C
3.3
5.0
6.0
LMZ14201
www.ti.com SNVS649E –JANUARY 2010–REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO= 100uF X7R Ceramic;
Tambient = 25 C for efficiency curves and waveforms.
Efficiency 36V Input @ 85°C Dissipation 36V Input @ 85°C
Figure 21. Figure 22.
Efficiency 42V Input @ 85°C Dissipation 42V Input @ 85°C
Figure 23. Figure 24.
Line and Load Regulation @ 25°C Line and Load Regulation @ 85°C
Figure 25. Figure 26.
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1.9
2.0
2.1
2.2
2.3
2.4
2.5
010 20 30 40 50
INPUT VOLTAGE (V)
CURRENT (A)
85°C
SHORT CIRCUIT
ONSET
1.8
1.9
2.0
2.1
2.2
2.3
2.4
010 20 30 40 50
INPUT VOLTAGE (V)
CURRENT (A)
25°C
SHORT CIRCUIT
ONSET
1.8
1.9
2.0
2.1
2.2
2.3
2.4
05 10 15 20 25
INPUT VOLTAGE (V)
CURRENT (A)
25°C
SHORT CIRCUIT
ONSET
0
0.2
0.4
0.6
0.8
1
1.2
50 60 70 80 90 100 110 120
AMBIENT TEMPERATURE (C)
OUTPUT CURRENT (A)
36VIN
6VIN
24VIN
12VIN
VOUT = 3.3V
ÆJA = 19°C/W
20 mV/Div 200 Ps/Div
0.5 A/Div
LMZ14201
SNVS649E –JANUARY 2010–REVISED MARCH 2013 www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO= 100uF X7R Ceramic;
Tambient = 25 C for efficiency curves and waveforms.
Output Ripple Transient Response
24VIN 3.3VO1A, BW = 200 MHz 24VIN 3.3VO0.5A to 1A Step
Figure 27. Figure 28.
Thermal Derating VOUT = 3.3V Current Limit 1.8VOUT@ 25°C
Figure 29. Figure 30.
Current Limit 3.3VOUT@ 25°C Current Limit 3.3VOUT@ 85°C
Figure 31. Figure 32.
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